Mercedes-Benz 540 K Special Roadster

Mathieu Heurtault/Gooding & Co. via Bloomberg

A 1936 Mercedes-Benz 540 K Special Roadster. One of only 30 built, it was estimated to sell for as much as $16 million at a two-day auction of classic cars at Gooding & Co. in Pebble Beach, California, on Aug. 18-19, 2012. It sold for $11.8 million with fees, a record for the marque at auction.